linux-kernel - [PATCH-v2 0/3] percpu_ida+Co: Make percpu_ida

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Date:	Mon, 20 Jan 2014 03:44:43 +0000
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	target-devel <target-devel@...r.kernel.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Kent Overstreet <kmo@...erainc.com>,
	Jens Axboe <axboe@...nel.dk>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH-v2 0/3] percpu_ida+Co: Make percpu_ida_alloc accept task state bitmask

From: Nicholas Bellinger <nab@...ux-iscsi.org>

Hi Linus,

Here is the -v2 series for converting percpu_ida_alloc() + consumer
usage to accept the task state bitmask parameter, w/o the extra
legacy gfp_t wrapper.

As requested, the first patch contains only the parameter change
to percpu_ida_alloc() + existing consumers, and makes no semantic
or behavior change.  This patch is CC'ed for stable, and will need
some light massaging to apply back to v3.12.y.

The second patch is a blk-mq cleanup to propigate the task state
bitmask usage up to the blk-mq vs. legacy split in blk_get_request().

The last patch fixes the original iscsi-target session reset bug
by passing TASK_INTERRUPTIBLE, and adds the signal_pending_state()
bit required in percpu_ida_alloc() code.  This is also CC'ed for
v3.12.y.

CC'ing Ingo + Peter for TASK_RUNNING + prepare_to_wait() bit.

Thank you,

--nab

Kent Overstreet (1):
  percpu_ida: Make percpu_ida_alloc + callers accept task state bitmask

Nicholas Bellinger (2):
  blk-mq: Convert gfp_t parameters to task state bitmask
  iscsi-target: Fix connection reset hang with percpu_ida_alloc

 block/blk-core.c                         |    4 +++-
 block/blk-flush.c                        |    2 +-
 block/blk-mq-tag.c                       |   14 +++++++-------
 block/blk-mq-tag.h                       |    2 +-
 block/blk-mq.c                           |   28 ++++++++++++++--------------
 drivers/target/iscsi/iscsi_target_util.c |    8 ++++++--
 drivers/target/tcm_fc/tfc_cmd.c          |    2 +-
 drivers/vhost/scsi.c                     |    2 +-
 include/linux/blk-mq.h                   |    4 ++--
 include/linux/percpu_ida.h               |    3 ++-
 lib/percpu_ida.c                         |   17 +++++++++++------
 11 files changed, 49 insertions(+), 37 deletions(-)

-- 
1.7.10.4

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